Modify a Text File Using Sed

1 hour
  • 2 Learning Objectives

About this Hands-on Lab

You are working at a firm that is collecting information about ancient Greece that will be published in a new book.

A member of your team has contributed a text file that contains the fable of the “The Ants and the Grasshopper.” However, the text is incorrect as all of the instances of the word ‘ants’ has been replaced with the word ‘cows’.

You will need to modify this file using a sed command so that the file will have the correct text. All instances of the word ‘cows’, regardless of case, needs to be replaced with the word ‘ants’.

Once you have accomplished this task, leave the file on the system so that your editor can review your work.

NOTE: You only need to ignore case sensitivity on the input, not match case on the output.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Use `sed` to Change a Word in the File

The word ‘cows’ needs to be replaced with the word ‘Ants’ in the fable.txt file.

This can be done with the following command:

sed -i 's/cows/Ants/Ig' fable.txt 
There Should Be No Other File in the Home Directory

There should be no other file in the home directory. The sed command must be run
"in place," and no other temporary file should be used.

Additional Resources

Check the Activity Guide for more instructions as appropriate

Note: Please wait an additional 1-2 minutes to allow the the server to fully provision before connecting via ssh.

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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